Dehydrating apparatus.



, I. S. JOSEPH.`

DBHYDRATING APPARATUS.

APPLICATION FILED 1ML-14, 1914.

Patented 00t.6,1914. 2 SHEETS-SHEET 1 y ,fi

I.. S. JOSEPH.

DEHYDRATING APPARATUS.`

APPLICATION FILED 1,111.14, 1914.

1,1 12,454. Y Patented oct. 6, 1914.

' asuma-SHEET z.

fw MM M man srATEs YPATENI? OFFICE IRWIN S. JOSEPH, F BAHWAY, NEW JRSEY.

DEHYDRA'TING nrruinari'rs.A

. Specicatlon of Letters Patent.

Patented oet. o, 1914.

Application led January 14, 1914. Serial No. 812,015

To all @from it may concern: s

'Be 1t known that I, IRWIN S. JOSEPH, a

- citizen of the United States, residing at Rahway, county of Union, State of New Jersey', have invented certain new and useful Improvements in Dehydratlng Apparatus, of which the following is a full, clear,

and exact description.

vMy invention relates to dehydrating apparatus and has for; its object to provide means for utilizing the waste heat of glass furnaces and the like for dehydrating waste l plaster of Paris, i. e., the hydrated plaster of Paris that has been used in the manufacture of plate glass so that it may be repeatedly used.

Heretofore the plaster of Paris used to secure the plates of glass to the grinding and polishing tablesvhas not'only not been reclaimed so as to be used again, but has constituted a source of annoyance and expense on account of its accumulatlon and necessary removal. lI have invented means wherebyv it may be easily reclaimed by the use of simple apparatus heated by the waste heat from the glass furnaces.

The following is a description of an embodiment of my invention, reference being had to the `accompanying drawings, in which,

Figure 1 shows a plan view of apparatus vembodying' my invention; Fig. 2 is auside f elevation of a portion of the same; F1g. 3vv is aside elevationof a portion showing the.

relation of the heating chamber to the glass furnace; and, Fig. 4 is a partial transverse section andpartial end view of the furnace 'and heating chamber.

' ported movable shallow pans 8 mounted on wheels 8 so as to form cars for containing the plaster to be reclaimed. Above the fury nace is a sheathing or cover 9 ofrsheet iron,

covering the tracks and the cars so as to largely conne the waste lieat rising from the root of thel furnace. This forms a chamber closed at one end by a permanent closure 10 and `at the other by a4 movable door 11.4 This door is lifted by a chain 12 passing over suitable ulleys. The door 11 is' provided with openings 13 for the admission` of air sov that a current of air can be kept passing through the chamber. A flue 14 is connected to the center of .the upper' surface of the chamber and is provided with an exhaust fanv15, which may be operated hen necessary, to Cause thetair to circulate. 16 are battle plates which deflect the passing air-downwardly upon the contents of the pans 8.

The flue is, provided with a damperv 16 for regulating the flow of air therethrough.

The cars may be linked or lcoupled together by links 17 if desired. In order to provide for the' easy removal of the cars from the chamber, supplemental rails 18 beyond the furnace and outside of the chamber are provided, on to which the cars can be rolled one -at atime when the door is open,

and then removed s o as to permit the removal of all the cars. Y

In using my apparatus to reclaim hydrated plaster of Paris- (CaSO42I-I2O). I

place in the pansS the used plaster suitablyv Y air dried and pulveri/zed'fthe layer of plaster being about two and one-half inches' in depth. I then roll the cars into the heating chamber one at a time. The door' is then lowered and the fan and damper so manipulated as to maintain a passing current of air at a suitable. temperature, such as 105 to 150 centigrade, preferably about 120 C. The plaster in the pans is kept subjected to these conditions until it is dehydrated, forming CaSOpILO when it is ready to be used again, being substantially the same as plaster 'of Paris freshly made in the ordinary way. At 120o` C. a heating ot twenty-four hoursv is more than ample for dehydrating so that one reclaimingrun can be'made for each furnace run. During this period, the heat from the glass furnace va ries somewhat, but it is high enough for a suitably long period'to complete the dehydration.

As will be evident, my invention permits of various modifications without departing from the spirit of my invention or the scope of the appended claims. The form described having .rolling cars and a chamber which can be opened at the end is the form preferred by nie.

Vhat l claim is:

l. ln/a reclaiming apparatus, the combination of a glass furnace having a straight longitudinally extending combustion chamber, a longitudinally extending sheet metal dehydrating chamber above the combustion chamber and in close proximity thereto, the,

of said rails being approximately in the' horizontal plane passing through the. top of said roof.

2. In a reclaiming apparatus, the combination of a glass furnace having a straight longitudinally extending combustion chamber, a longitudinally extending dehydrating chamber above the combustion chamber and in close proximity thereto, the two chambers having their longitudinal axes substantially in the same vertical plane and being disconnected so that the dehydrating chamber is heated only by radiation from said combustion chamber, said combustion chamber extending substantially the full length of the dehydrating chamber, and shallow containers within said dehydrating chamber and in close proximity to the roof of said combustion chamber, posts extending above said glass furnace, brackets thereon, and rails Within said dehydrating chamber sup ported by said brackets and carrying said containers.

3. In a reclaiming apparatus, the combination of a glass furnace having a straight longitudinally extending combustion chamber, a longitudinally extending dehydrating chamber above the combustion chamber and inl close proximity thereto, the two chambers having their longitudinal axes substantially in the same vertical plane and being disconnected so that the dehydrating chamber is heated only by radiation from said combustion chamber, said combustion chainber extending substantially thc full length of the dehydrating chamber.

IRVN S. JUSEPH. Witnesses H. B. BROWNELL, E. E. MORSE. 

